God's revelation, the Bible, is in conflict with your assertion. For the sake of brevity I will only proof text from the New Testament.
Revelation 19:5 Then a voice came from the throne, saying, "Praise our God, all you His servants and those who fear Him, both small and great!"
Revelation 14:7 ... saying with a loud voice, "Fear God and give glory to Him, for the hour of His judgment has come; and worship Him who made heaven and earth, the sea and springs of water."
Revelation 11:11 Now after the three-and-a-half days the breath of life from God entered them, and they stood on their feet, and great fear fell on those who saw them.
1 Peter 3:15 But sanctify the Lord God in your hearts, and always be ready to give a defense to everyone who asks you a reason for the hope that is in you, with meekness and fear;
1 Peter 2:17 Honor all people. Love the brotherhood. Fear God. Honor the king.
Hebrews 12:28 Therefore, since we are receiving a kingdom which cannot be shaken, let us have grace, by which we may serve God acceptably with reverence and godly fear.
Ephesians 5:21 ..submitting to one another in the fear of God.
2 Corinthians 7:1 Therefore, having these promises, beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.
And as a rebuke about those who do not fear.
Romans 3:16-18 Destruction and misery are in their ways; And the way of peace they have not known. There is no fear of God before their eyes."
What I note is that you do not seek to edify, but rather to provide information that begs the issue if God is a just God.
I seek to proclaim what God has said in His Word and to correct those that have corrupted or occluded its meaning. If one fears God out of a humble heart he would not dare to judge God. God is just and so justice is not an attribute that is external to God that can used as a standard to judge Him, but is intrinsic to who He is and so justice is a concept that reflects Godliness.
What you seek to tell me is that the God that would not strike Lucifer down, is a God that would condemn men and not give them the power to decide their own fate.
Revelation 20:10 The devil, who deceived them, was cast into the lake of fire and brimstone where the beast and the false prophet are. And they will be tormented day and night forever and ever.
God is transcendent of time, His judgement and justice is not according to your understanding or timeline, but make no mistake it is complete and thorough.
For a more thorough apprehension of these doctrines, I suggest the following for further study and understanding of the scriptures from the perspective of the founders and the reformation: The Institutes of the Christian Religion by John Calvin and Bondage of the Will By Martin Luther.